Ok this looks like the GreenBird crew
get interested in the video around 1 min 50sec in
45ft tall 10ft chord and weighs 600lbs
produces 6-7 tonnes of force
and they claim on an equal size soft sail and wing, the wing is going to be twice as effective
You've never seen a boat sail like this - Detours: S. 2 Ep. 3
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Posted by: robriley@rocketmail.com
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